Using the below information from our December 2018 business activities, find COGS and Ending Inventory under FIFO, LIFO, and Weighted Average. 1-Dec Beginning Inventory 10 @ $10 5-Dec Purchase 15 @ $15 12-Dec Sale 15 @ $40 13-Dec Purchase 5 @ $20 18-Dec Purchase 10 @ $18 22-Dec Sale 15 @ $40 25-Dec Sale 5 @ $40